Pentair FLECK 9000 SXT Installer Manual page 39

• The diagrams above illustrate how the flexible piping connection should be mounted;
• in order to adequately compensate the tank elongation the flexible piping must be installed
horizontally;
• should the flexible piping connection be installed in vertical position, instead of compensating
the elongation, it will create additional stresses on the valve & tank assembly. Therefore this is
to be avoided;
• the flexible piping connection must also be installed stretched, avoiding excessive length. For
instance 20 - 40 cm is enough;
• excessively long and non-stretched flexible piping connection will create stresses on the valve
and tank assembly when the system is pressurized, as illustrated in the below picture: on the left
the assembly when the system is unpressurised, on the right the flexible piping connection when
put under pressure tends to lift up the valve when stretching up. This configuration is even more
dramatic when using semi-flexible piping;
Ref. MKT-IM-020 / B - 08.06.2018
Installer Manual Fleck 9000 - SXT - Installation
Support to wall
200 mm flexible
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